Diastereoselective Construction of Quaternary Carbons Directed via Macrocyclic Ring Conformation: Formal Synthesis of (−)-Mesembrine
作者:Steve Arns、Marie-Eve Lebrun、Christiane M. Grisé,、Irina Denissova、Louis Barriault
DOI:10.1021/jo701833v
日期:2007.11.1
this article, we report a highly diastereoselective new method for the generation of quaternary carbon centers through an anionic oxy-Cope/alkylation sequence where the diastereoselectivity is induced by the conformation of a macrocyclic tetrasubstituted enolate. The use of our methodology culminated in the formal total synthesis of (−)-mesembrine (34) in 11 steps from known starting materials.
在本文中,我们报告了一种通过阴离子氧基-Cope /烷基化序列生成非对映选择性的高非对映选择性新方法,其中非对映选择性是由大环四取代烯醇酸酯的构象诱导的。我们的方法学的使用最终使从已知原料开始的11个步骤正式合成了(-)-中间膜(34)。